http://www.theguardian.com/environment/earth-insight/2014/mar/14/nasa-civilisation-irreversible-collapse-study-scientists

povodny clanok http://www.atmos.umd.edu/~ekalnay/pubs/2014-03-18-handy1-paper-draft-safa-motesharrei-rivas-kalnay.pdf

e:super ten povodny clanok. je to napisane tak ze aj nematematik pochopi

"It is important to note that in both of these scenarios, the Elites |due to their wealth|
do not suffer the detrimental effects of the environmental collapse until much later than the Commoners.
This buffer of wealth allows Elites to continue "business as usual" despite the impending
catastrophe. It is likely that this is an important mechanism that would help explain how historical
collapses were allowed to occur by elites who appear to be oblivious to the catastrophic trajectory
(most clearly apparent in the Roman and Mayan cases). This buffer effect is further reinforced
by the long, apparently sustainable trajectory prior to the beginning of the collapse. While some
members of society might raise the alarm that the system is moving towards an impending collapse
and therefore advocate structural changes to society in order to avoid it, Elites and their
supporters, who opposed making these changes, could point to the long sustainable trajectory "so
far" in support of doing nothing."